1. Warm-Up
Jana and Jerry are getting snacks from the vending machine. There are only 4 bags of Cheetoes, 3 bags of Doritos, 2 packages of peanuts and 1 package of Starbursts left!
If Jana is first in line, what is the probability of Jana buying Doritos and then Jerry buying peanuts?
Fraction_____ Decimal_____ Percent_____

2. STAAR
REVIEW

3. Making Predictions about a Population

4. Statistics deal with collecting, organizing and interpreting data.
A survey is a method of collecting information.
The population is the group being studied.
The sample is the part of the group that is actually surveyed.

5. For each survey topic, determine which set represents the population and which represents an sample of the population.

6. Example #1

7. Example #2

8. Got it? Try these and find out!
A survey found that 6 out of every 10 students have a blog.
What is the probability that a student at the school has a blog?
Suppose there are about 250 students at the school.
About how many have a blog?

9. Example #3

10. Example #4
Predict how many less students have a television in their bedroom compared to those who do not have a television out of 1,370 students.

11. The bar graph shows the results of a survey of Hamilton Middle School seventh graders. Use the bar graph to determine the following probabilities.
The probability of choosing a career in public service.
The probability of choosing a career in education.
The probability of choosing a career in sports.
Predict how many students out of 400 will enter the education field.
Predict how many students out of 500 will enter the
medical field.

12. Use the circle graph that shows the results of a poll to which 6,000 teens responded.
Predict how many more of the approximately 28 million teens in the United States would buy a music CD compared to going to a movie if the were given $20.

13. STAAR REVIEW